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S12700 V200R010C00 Configuration Guide - Device Management

This document describes the principles and configurations of the Device Management features, and provides configuration examples of these features.
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Configuring PTP on an Interface

Configuring PTP on an Interface


  1. Run:


    The system view is displayed.

  2. Run:

    interface interface-type interface-number

    The interface view is displayed.

  3. Run:

    ptp port-type { bc | tc }

    The clock type of the interface is set to TC or BC.

    By default, the clock type is not configured on an interface.

  4. Run:

    ptp enable

    PTP is enabled on the interface.

    By default, PTP is disabled on an interface.

  5. In the TC interface view, run:

    ptp domain domain-value

    The domain to which PTP interfaces belong is configured.

    By default, all PTP interfaces belong to the domain configured in the system view. When a TC interface of a device needs to transmit different clock source signals, configure the PTP domain to which the TC interface belongs.

    A BC interface belongs to the PTP domain configured in the system view. So you do not need to configure a PTP domain for a BC interface in the interface view.

    You can specify the PTP domain to which a TC interface belongs in the interface view or use the PTP domain configured in the system view.

    A TC interface forwards PTP messages of PTP domains. To forward PTP messages of each domain independently, configure message forwarding mechanisms.

  6. Run:

    ptp delay-mechanism { delay | pdelay }

    A delay measurement mechanism is configured.

    By default, no delay measurement mechanism is configured for PTP ports.
    Different delay measurement mechanisms are not compatible. Therefore, PTP interfaces on a link must have the same delay measure mechanism configured.

  7. (Optional) Run:

    ptp announce-drop enable

    The interface is configured to drop received Announce messages.

    By default, an interface does not drop Announce messages. Announce messages are used for PTP clock synchronization. If an interface is configured to drop Announce messages, the device cannot receive clock signals from other devices through the interface. Generally, a user-side interface is configured to drop Announce messages.

  8. (Optional) Run:

    ptp clock-step { one-step | two-step }

    The mode in which PTP devices timestamp PTP messages to perform clock synchronization is configured.

    By default, PTP messages are timestamped in one-step mode.

Updated: 2019-08-21

Document ID: EDOC1000142080

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